Platinum Complexes of Rigid Bidentate Phosphine Ligands in the Hydroformylation of 1-Octene
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- 作者：Jarl Ivar van der Vlugt ; Ruben van Duren ; Guido D. Batema ; René ; den Heeten ; Auke Meetsma ; Jan Fraanje ; Kees Goubitz ; Paul C. J. Kamer ; Piet W. N. M. van Leeuwen ; and Dieter Vogt
- 刊名：Organometallics
- 出版年：2005
- 出版时间：October 24, 2005
- 年：2005
- 卷：24
- 期：22
- 页码：5377 - 5382
- 全文大小：194K
- 年卷期：v.24,no.22(October 24, 2005)
- ISSN：1520-6041
文摘
The synthesis of the two novel diphosphine compounds 1,2-bis(3-(diphenylphosphino)-4-methoxyphenyl)benzene (1; Terphos), and 1,2-bis(2-diphenylphosphino)benzene (2), bothderived from a terphenyl backbone structure, are described. Straightforward synthetic routeshave been employed to obtain these ligands in good yields from cheap starting materials.The coordination of ligands 1 and 2 with PtCl2(cod) has been studied by NMR spectroscopy,and the X-ray crystal structures of the resulting complexes 4 and 5 were determined. The31P NMR spectra of the mononuclear products demonstrate solely cis coordination for bothbidentate ligands, with corresponding coupling constants JPt-P of 3810 Hz (cis-[PtCl2(1)],complex 4) and 3712 Hz (cis-[PtCl2(2)], 5). The bite angles P1-Pt-P2 were 98.74 and 105.89
,respectively, in the distorted square-planar complexes. The new diphosphines have beenapplied in the platinum/tin-catalyzed hydroformylation of 1-octene, and both ligands giveactive and selective platinum catalysts.
,respectively, in the distorted square-planar complexes. The new diphosphines have beenapplied in the platinum/tin-catalyzed hydroformylation of 1-octene, and both ligands giveactive and selective platinum catalysts.